Definition Shadow shadow is the darkness or darkness caused by the blocking of an object of light, preventing this light from reaching a surface. When someone stands in the sunlight, the body obscures some light from the space on which it stands on the ground. A dark area in the shape of the body, which obscures the earth from the light of the sun, and in the case of the lunar eclipse occurs the same thing, during the occurrence of eclipse, the moon is then present in the shadow of the earth, which is blocked by sunlight. Where shadows exist The shadow always appears next to an object directly facing the light source. If this light source is smaller than the body of the light barrier, the shadow is then equal to the darkness. If the light source is wide, in this case it reflects a dark shadow. This shadow name (full shadow), and the area surrounding the full shade will be darker, called the area (the tangent shadow). The shadow is usually dark, because the body holds all the light directed toward the surface. As for the rayed shadow, it shows the moment when some light passes through the object to the surface. The large light source is the cause of a shadow and shadowy shadow called the luminous shadow; because part of the light passes through the lighted body toward the shadows, making it look radiant and lit. In the strong bright sunlight the shadows look clear and dark, The shadows are dim; the sun's light is dim in those days, and the dispersion of the atoms that spread through the air causes the reflection of some light in the shadows to illuminate them. The shadow of the equator is the shadow of the equator, which is formed when the sun disk reaches the middle of the sky. This shadow is one of the shortest shadows formed, and the shadow is known in that period as the tried compass or star to use the shadow here as a measure of time. Read it based on the length of the shade of the stick installed in the center of the disk made of wood. The length of the day is divided from the midpoint, ie the afternoon time. The length of the shadow becomes a moment on a certain time. Obviously, the time measured in this manner is approximated, different when the sun is present in each of the 12 known towers, The pregnancy signifies the beginning of the spring, followed by the Cancer Tower which announces the beginning of the summer, the Libra which means autumn solutions, and then when the sun is in Capricorn announcing winter solutions.
Nice picture. :D
Thanx